The stock rudder horn gets glued into the slot cut out in the rudder, so I don't see where this is weakening the structure...

But, I have my replacement 200 in the Integral. I've managed to put about a dozen flights on it. First 3 were with 15% Cool Power and a 17x12. More than enough power. Now I'm running PowerMaster YS 20/20 and a 17x13 and it's just as insane on the power.

Ryan and I were flying during the weekend (20-30mph winds) and his OS-160 was cooking pretty good. The 200 was probably the same speed on the horizontals, but seemed to keep a constant pull on the uplines. Both planes never knew it was windy, which made the motor comparison "appearance" testing easier. It almost made us think that it would be more fun to fly in heavy winds than in calm air.

I’ll be trying more testing with some other props and fuels to see how it all works together.